1. Math
2. Statistics And Probability
3. we want to estimate the probability that packing an order...

# Question: we want to estimate the probability that packing an order...

###### Question details
We want to estimate the probability that packing an order of two systems takes more than 20 minutes.

Let P1 = time for packing the first system
P2 = time for packing the second system
T = total time to pick two systems
T = P1 + P2